Lubricant Discussion- Engine Oil / Gear Oil

[asimkhalidfb]

How is that determined? With worn bearings 0w20 will have critically low pressure at idle

[asimkhalidfb]

1zr has rollers in the valvetrain, and inspite of that if op has lifter bleed or if hydraulic lifters are not maintaining lash, he better change all these components, anyways all is conjecture before actually looking at the valvetrain. Interestingly the rollers usually get stuck due to dirty oil, but sometimes if there are too many friction modifiers e.g. when people add moly to an already high moly oil or use additives in excess the cam lobes just actuate on the roller but rollers never roll since the cam lobe is just gliding over it in these scenarios lobes would also be scuffed/worn

[Mun33b]

Engine wear is maximum at cold start. Having oil which has high viscosty figure for room temperature means less flow on cold start, which equates to bearings and mechanical contacts running dry, accelerating wear even further. Putting higher viscosity oil in worn out engine is just a jugaar, till it spins the bearing out. Regarding thin viscosity oil loosing pressure on operting temperature, means engine is junk to begin with, changing oil viscosity isnt going to do any good.
You are claiming toyota is recommending 20w50 for VVTi engines? I will need some reference backing that up. Yes 20w50 may be used temporarily if correct grade is not available, but no way is it preferred grade for maximum engine life, and it doesnt matter if people on mars are using it. Engine designs have become way tighter tolerance wise, modern engine tolerances are simply not compatible with thick viscosities. Simple logic is, lesser viscosity > more flow > more cooling > less chances of tearing oil film in tight tolerance.

[Mun33b]

Yes, physical damage cannot be addressed with any kind of lubricant band aid, including think oil and additives.

[asimkhalidfb]

This giving average 300,000 before any major repair is required.

My cars were also serviced by toyota dealerships in gcc with 20w50 in warranty

Giving you outside pak example , bcz you are trying to pin 20w50 on indus

Btw indus manual also approves use of 20w50

[asimkhalidfb]

Waiting for you to provide evidence where toyota recommends only 0w20 outside CAFE and euro countries

Anecdotal evidence that with 0w20 engine will have less wear than 20w50

Evidence where 20w50 spins bearings

Evidence that PD pump has different flow for 0w20 vs 20w50

Evidence that viscosity is measured at room temperature.

[aliehsan312]

AoA,
I have a Japanese Wagon R Stingray 2013 Model. It has travelled 112,000 KMs and It is due for a gear oil change. I don't know the history of its oil change.
What Oil/Grade should I use? Also should I go to Suzuki Service Centers or other shops?
If there are any recommended outlets in Islamabad/Rawalpindi area please mention them too.

[asimkhalidfb]

Which transmission does it have?

[aliehsan312]

automatic

[sardarg]

sir if the frame code starts with 'CFJ' it is a CVT transmission car and you shall use CVT fluid.

[pwuser162557941033]

Considering Havoline MTF is "self-certified" GL-4, it's important to bear this quote from the data sheet in mind:

Although Havoline® Manual Transmission Fluid SAE 80W-90 does meet API GL-4, this is a secondary target and it is nevertheless not designed for nor intended for use in any spiral bevel or hypoid drive axles. It is based upon detergent-zinc type additive technology, and so should not be mixed in service with conventional sulfur-phosphorus type EP gear oils, nor should it be used in any manual transmissions or transaxles for which sulfur-phosphorus based fluids are specified...

Some mixing is bound to occur if you're replacing conventional GL-4 in an older manual transmission design, unless you're rebuilding one from scratch.

"Gear oil change na krwae gear awaz krne lageinge"

Complete BS. Change your gear oil at the recommended interval and use the correct type according to your owner's manual.

The only reason a fluid change would make your gearbox noisier is if they overfill or underfill it, or you use a catastrophically wrong kind of fluid.

[asimkhalidfb]

All mtf that i have seen, including the toyota mt lv are never rated gl4 or gl5, they have a different add pack than gl4 or gl5 but closer to gl4, thats probably why havoline has self certified as gl4 and so is the shell spirax mtf (also self certified gl4). Some mixing is bound to happened but the leftover add pack from previous remaining fluid wud be negligible. MTF is not a new thing and older transmissions have been using all kinds of fluids gl3 4 5 mtf and some manual transmissions even take atf and motor oil including toyota and honda. Also by EP havoline probably means gl5, which again OP probably wudnt have put in his cultus

[pwuser162557941033]

shell spirax mtf (also self certified gl4).

Could you give me a reference?

Some mixing is bound to happened but the leftover add pack from previous remaining fluid wud be negligible. MTF is not a new thing and older transmissions have been using all kinds of fluids gl3 4 5 mtf and some manual transmissions even take atf and motor oil including toyota and honda.

And of course, we'd have to make sure whatever add pack is left over actually is negligible, rather than assuming the oil's being replaced after an OCI, rather than being topped up for whatever reason, e.g. leaks.

I've had to replenish pretty new GL-4 because of a seal leaking, and this disclaimer isn't just a CYA because the self-certification is done with oil companies' characteristic testing procedures, as was the datasheet disclosure. Just in case you end up with the fringe case of having metallurgy that reacts negatively to the zinc-based add pack compared to the sulfur-phosphorus -- the whole point being that if the manufacturer recommends 15W-40 motor oil in your transmission, then that's what they've validated it with.

Also by EP havoline probably means gl5, which again OP probably wudnt have put in his cultus

Chevron doesn't sell their GL-4 here for consumer retail, to my knowledge.

There are transmission shops perfectly willing to put GL-5 in a transmission and this very MTF in a hypoid gear drive and not even mention what they've done, probably because they don't or can't read. Especially if we take their saying about the cause of gearbox noise being a fluid replacement into consideration.

[asimkhalidfb]

Could you give me a reference?

you can see the shell pakistan website or bottle of spirax.

you probably did not understand what OP asked, he is changing his transmission oil not topping up.

for 100 percent oil change in a way that additives do not mix disassemble your transmission and scrape off remaining add pack from surfaces (since many additives modify surface and form a layer on parts, other than the oil film) so after the oil change in case of different oil they will again get back in to suspension (as the additive surface layers shear for protection). nobody will do it though and under most circumstances residual oil in OPs transmission would be 100-200 ml which after mixing with 2000-3000 ml will be negligible

many transmission do specify the use of gl5

could not comprehend most of your post and dont think its in context to what the OP asked.

[waleed80]

Please recommend a good engine oil for Mira 2018 45000 km driven

[asimkhalidfb]

Any 5w30 if your manual allows it, the ilsac 5w30 will be thinner and a3/b4 5w30 will be thicker both are fine

[asad03111760001]

What is the Engine Oil Capacity Grande 1.8 4.2 liter or is it ok to go for just 4 liter...i am putting only 4 liter because the workshop is insisting to put just 4 liter engine oil 93000 km driven grande 1.8. Please give answer urgently

[haseeb.basharat]

Don't you have owner's manual?
It's 4.2L with new oil filter.

[aziz.rehan]

Assalamualaikum
Is Pso computer engine oil of good quality?

[saim.shahid900]

Hey i want some help that im having suzuki 110s bike. And i use liqui moly oil. So please guide me how many kilometers i can ride per? My oil distributor was saying i can ride 3000 km after oil change.
Please guideme.